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Old 02-27-2019, 09:30 AM
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520SC 520SC is offline
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Join Date: Feb 2017
Location: Ewa Beach, HI
Cobra Make, Engine: 1966 Street Beasts Cobra 427 S/C, 502 cid
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The symptom I had was a loud squeal, not grinding, so your problem may be different!
Sounds very different. My problem is definitely caused by gear teeth clashing resulting in progressively worsening damage.

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BTW, is there anything behind the ring gear that the starter drive gear could make contact with after it is (too) fully engaged?
No.

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Another thought: There are two different starter drive gears if my recall is accurate. One is for a flywheel and the other for a flexplate which - I think - have different numbers of teeth.
The one I've been ordering says that it's compatible with a 1974 Thunderbird 7.5L. Those all came with C6 3-speed automatic transmissions (which is what I'm using).
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Last edited by 520SC; 02-27-2019 at 09:33 AM..
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